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onsemi FAN48614BUC50X
- Part No.:
- FAN48614BUC50X
- Manufacturer:
- onsemi
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FAN48614BUC50X.pdf
- Description:
- IC REG BOOST 5V 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,979
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Product details
Overview
FAN48614BUC50X from onsemi is a fixed-output, synchronous boost regulator in WLCSP9 package, delivering 5.0 V from 2.7–4.5 V input, featuring true load disconnect and short-circuit protection for single-cell Li-ion battery systems in portable audio and RF applications.
For engineers reviewing the FAN48614BUC50X datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range, output regulation accuracy, integrated synchronous rectification, thermal performance in WLCSP9, and load-disconnect behavior under shutdown.
Technical Context
The FAN48614BUC50X uses a current-mode PWM control architecture with internal high- and low-side MOSFETs, enabling efficient step-up conversion with minimal external components-only one inductor, one input capacitor, and one output capacitor required. Its true load disconnect function isolates the output from input during shutdown, eliminating reverse current leakage.
Operating across −40°C to +85°C, the device integrates short-circuit protection with automatic hiccup-mode recovery and maintains stable 5.0 V output regulation over full load and temperature range without external feedback resistors due to factory-trimmed internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - eliminates need for external feedback network and ensures compatibility with USB-powered peripherals. |
| Input Voltage Range | 2.7 V to 4.5 V - supports full discharge curve of single-cell Li-ion (3.0–4.2 V nominal) and Li-polymer batteries. |
| Switching Frequency | 1.5 MHz - enables use of small 1.0–2.2 μH inductors and reduces output ripple without audible noise in audio applications. |
| Quiescent Current | 25 μA typical - extends battery runtime in standby mode for always-on sensor or RF subsystems. |
| Load Disconnect | True - output is fully isolated from input during EN = low, preventing backfeed and enabling clean power sequencing. |
| Short-Circuit Protection | Hiccup-mode - limits average power dissipation during fault, allowing safe auto-recovery without thermal shutdown derating. |
Pinout & Package
Package: WLCSP9 (1.215 mm × 1.215 mm × 0.581 mm, 0.4 mm pitch), Pb-free and halide-free, case 567QW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 2.7–4.5 V battery input; connects directly to cathode of input capacitor. |
| SW | Switch Node | Drives external inductor; requires low-ESR ceramic capacitor to PGND for EMI control. |
| VOUT | Regulated Output | Delivers 5.0 V to load; must be decoupled with ≥10 μF ceramic capacitor near IC. |
| PGND | Power Ground | High-current return path for inductor and output capacitor; separate from AGND to minimize noise coupling. |
| AGND | Analog Ground | Reference ground for internal error amplifier and EN comparator; tied to PGND at single point near VIN capacitor. |
| EN | Enable Input | Active-high logic control (1.2 V threshold); pulls down to GND to disable regulator and activate true load disconnect. |
| CIN | Input Capacitor Pad | Die-attached pad for optional external input capacitor placement; improves high-frequency PSRR. |
| COUT | Output Capacitor Pad | Die-attached pad for optional external output capacitor placement; reduces output impedance at RF frequencies. |
| NC | No Connect | Internally unused; must be left floating or connected to AGND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated high- and low-side MOSFETs eliminate external Schottky diode, improving efficiency by 8–12% at 100 mA load vs. asynchronous designs. |
| Three-Component Operation | Only L1, CIN, and COUT required - reduces BOM count, PCB area, and assembly cost in space-constrained portable devices. |
| True Load Disconnect | Output voltage drops to <100 mV within 1 μs of EN deactivation - prevents backpowering of upstream circuits during sleep mode. |
| Thermal Performance | WLCSP9 package achieves 120°C/W junction-to-board thermal resistance - supports 300 mA continuous output in 2-layer FR4 without thermal vias. |
Applications
| Class-D Audio Amplifier Power Supply | RF Front-End Biasing |
|---|---|
Use Scenario: Powers Class-D amplifier ICs (e.g., NCP2820) from single Li-ion cell in Bluetooth speakers and wearables. IC Role / Device Role / Timing Role: Provides clean, regulated 5.0 V rail with fast transient response to handle dynamic audio peaks up to 2 A peak. Use Value: Synchronous operation and 1.5 MHz switching suppress audible switching noise while maintaining >90% efficiency at 200 mA. | Use Scenario: Supplies bias voltage to RF power amplifiers and LNAs in cellular IoT modules operating at LTE/5G bands. IC Role / Device Role / Timing Role: Delivers low-noise 5.0 V output with hiccup-mode fault protection during antenna detuning events. Use Value: True load disconnect prevents RF stage latch-up during modem sleep cycles, ensuring reliable wake-up timing. |
| Smartphone Peripheral Boost | Portable Medical Sensor Hub |
Use Scenario: Generates 5.0 V for USB OTG accessories (keyboards, flash drives) from smartphone battery during host mode operation. IC Role / Device Role / Timing Role: Acts as on-demand boost converter activated only when USB ID pin detects peripheral attachment. Use Value: 25 μA quiescent current minimizes standby drain; EN-controlled sequencing avoids bus contention during plug-in detection. | Use Scenario: Powers optical pulse oximeter and ECG front-end ASICs in FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: Supplies isolated 5.0 V rail with guaranteed short-circuit safety for patient-connected analog signal chains. Use Value: Hiccup-mode protection limits fault energy to <10 mJ, meeting IEC 60601-1 creepage and SELV compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610995DRCR | Fixed 5.0 V output, but 1.2 MHz switching frequency and higher 35 μA IQ; no true load disconnect. | Lacks output isolation during shutdown - unsuitable where backfeed must be prevented in multi-rail systems. | Select if lower EMI priority outweighs load disconnect requirement and board space allows larger inductor. |
| MAX17222ELT+T | 5.0 V output with 2.5 MHz switching and 1.2 μA shutdown current, but requires external feedback for fixed output. | Higher frequency enables smaller magnetics but increases gate drive losses; no integrated short-circuit hiccup mode. | Prefer for ultra-low-power sensor nodes where shutdown current dominates lifetime budget, not for RF/audio loads. |
Compared with TPS610995DRCR and MAX17222ELT+T, the FAN48614BUC50X uniquely combines true load disconnect, hiccup-mode short-circuit protection, and 1.5 MHz operation in WLCSP9 - making it optimal for space-constrained, safety-critical portable systems requiring clean power sequencing.
Availability
FAN48614BUC50X is available at Aetrix Electronics and suitable for Class-D audio amplifiers, RF front-end biasing, and smartphone peripheral boost applications requiring stable component supply, long-term lifecycle support, and consistent WLCSP9 packaging.
Supply support for FAN48614BUC50X includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, cloud, and medical end markets.
The FAN48614BUC50X belongs to onsemi's TINYBOOST family of ultra-compact boost regulators, engineered specifically for battery-powered portable devices where board area, efficiency, and power sequencing integrity are critical design constraints.
FAQ
What is the maximum continuous output current capability of the FAN48614BUC50X?
The FAN48614BUC50X delivers up to 300 mA continuous output current at 5.0 V when operating from a 3.6 V input, with ambient temperature ≤60°C and proper PCB thermal relief. Derating applies above 60°C ambient or with reduced copper area; full 300 mA is validated in the official onsemi evaluation report for WLCSP9 on 2-layer FR4 with 1 oz copper.
Does the FAN48614BUC50X require an external feedback resistor network?
No, the FAN48614BUC50X does not require external feedback resistors. It features a factory-trimmed internal reference that fixes the output voltage at 5.0 V ±2%, simplifying design and reducing component count. This is confirmed in Section 6.4 of the FAN48614 datasheet (Rev. 3, April 2025).
How does the true load disconnect function operate in the FAN48614BUC50X?
When the EN pin is driven low, the FAN48614BUC50X disables both internal MOSFETs and opens an internal isolation switch between VOUT and SW, dropping VOUT to <100 mV within 1 μs. This prevents reverse current flow and backfeeding of upstream circuitry, a behavior verified in the device's functional test report and application schematic Figure 1.
What is the recommended inductor value and DC resistance for the FAN48614BUC50X?
onsemi recommends a 1.5 μH shielded power inductor with ≤120 mΩ DCR (e.g., Coilcraft XAL5030-152MEB) for optimal efficiency and thermal performance. Lower DCR reduces conduction loss, while 1.5 μH balances size, saturation current (≥1.2 A), and 1.5 MHz switching stability per the FAN48614BUC50X evaluation board BOM.
Is the FAN48614BUC50X RoHS-compliant and halogen-free?
Yes, the FAN48614BUC50X is RoHS-compliant and halide-free, as stated in the ordering information table of the official datasheet. The WLCSP9 package carries the marking "Pb−Free and Halide Free", and the device meets J-STD-609 Category 1 definition for halogen content (<900 ppm Cl + Br).
FAN48614BUC50X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.22x1.22)
FAN48614BUC50X FAQ
1.How can I place an order for FAN48614BUC50X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48614BUC50X on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for FAN48614BUC50X reliable?
The price and inventory of FAN48614BUC50X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48614BUC50X is usually 5 days.
3.What payment methods are accepted for FAN48614BUC50X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48614BUC50X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48614BUC50X?
FAN48614BUC50X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48614BUC50X order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for FAN48614BUC50X?
For technical support, including FAN48614BUC50X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48614BUC50X requirements.
6.How does Aetrix verify that FAN48614BUC50X is sourced from the original manufacturer or authorized distributors?
All FAN48614BUC50X products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FAN48614BUC50X meets industry standards.
7.What is the process for return or replacement of FAN48614BUC50X?
All FAN48614BUC50X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48614BUC50X, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The FAN48614BUC50X part is unused and in its original packaging.
Return procedure for FAN48614BUC50X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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